Looks great Christina
I'm impressed at the generosity of your referral program - that's a HUGE percentage of 6 months worth of invoices...note that on your rates page it says something about 10% for referrals...is it one or the other or both? Also, maybe link to the $$$ page from that paragraph on the rates page...
Really smart use of your sidebar!
One other small thing, your page titles get cut off after 'Scotia'
Great job!